Use the master tarball for openstack depends

Infra is cracking down on use of externally fetched depends, and as part
of that we need to start blocking uses of -f and -e.

Luckily, we have master tarballs which are published on each change for
exactly this reason.

Change-Id: I4c53c8eac6788a703de2ad4b009b83a35ee7bbdc
Merge "Use the master tarball for openstack depends"